Are these inductors?

If so, can anybody estimate their ratings? Or is there a way I can measure them? I'm looking for something around a 4mH inductor to use in "Simplest Ever DC-DC Boost 12v to 73v" instructable by "pyrohaz". Also, are these potential inductors the same as the ones found in CFL light bulbs? And one more thing, why does the small one have 4 wires coming out, the medium one has 2 wires, and the big one has 10?

Did you make this instructable?

They are inductors and transformers. (There is more than meets the eye...)

At the most basic, you've got a wire wound around a ferrite, inductor core.

You medium coil, with one wire wound around the core is most likely acting as a RF Choke Coil. The wire is wound around a ferrite core to filter-out ("choke") high frequency AC currents. A dumb-old chunk of inductive metal that is too big to "vibrate" in high frequencies is a cheap, simple way to filter out those nasty frequencies.

They are all transformers of some description. The multiple wires may be separate tappings for the transformers, or they may be the result of "multi-filar" winding the transformer to reduce capacitance effects in the windings. Best thing to do is measure the inductance with a pulse generator and a scope.